Quick answers
- Is CVE-2026-49198 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-49198 being exploited in the wild.
- How severe is CVE-2026-49198?
- Informational severity, with a CVSS score of 8.3, published 29 May 2026.
- Which products and versions are affected?
- Acer Connect W6x Router W6x_GBL_2.00.000005 and earlier.
- Is there a fix for CVE-2026-49198?
- A patch was published on 2026-05-29: Fixed in firmware W6x_GBL_2.00.000008 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-49198 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-49198?
- Check whether you run Acer Connect W6x Router at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An improper access control vulnerability (CWE-284) exists in the local MQTT broker of Acer Connect W6x routers. The broker fails to properly enforce Access Control Lists (ACLs) regarding wildcard topic subscriptions. A remote attacker with low-level authenticated access can subscribe to '#' or similar wildcards to monitor all messages passing through the broker. This exposes sensitive system or user data transmitted via the MQTT protocol. The issue is resolved in firmware version W6x_GBL_2.00.000008.
Affected products
- Acer Connect W6x Router W6x_GBL_2.00.000005 and earlier
Timeline
- 2026-05-29: disclosed
- 2026-05-29: advisory
- 2026-05-29: patched: Fixed in firmware W6x_GBL_2.00.000008